2r-5=7-r

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Solution for 2r-5=7-r equation: 



2r-5=7-r

We move all terms to the left:

2r-5-(7-r)=0

We add all the numbers together, and all the variables

2r-(-1r+7)-5=0

We get rid of parentheses

2r+1r-7-5=0

We add all the numbers together, and all the variables

3r-12=0

We move all terms containing r to the left, all other terms to the right

3r=12

r=12/3

r=4

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